One day, when Harry had been running from Dudley and his friends, Harry ran into tom who unintentionally saved Harry from getting beat up. That one unintentional action sparked the relationship between them.
PSA: This story isn't meant for the feign of heart. It may be triggering in many ways. It deals with physical and emotional abuse, depression, self harm, suicide idealization, and many more possible triggering things.
Stand alone, but part of the Better With You World.